Portola Hills Weather Forecast

    • 59
    • 79

    Mostly Sunny

    • 63
    • 89

    Mostly Sunny

    • 63
    • 87

    Mostly Sunny

    • 63
    • 87

    Partly Sunny

    • 61
    • 86

    Partly Sunny

    • 58
    • 81

    Partly Sunny

    • 57
    • 78

    Mostly Sunny

Today 22 Sep Orange County Inland

Mostly sunny. Highs 83 to 86.

Tonight 22 Sep Orange County Inland

Mostly clear. Lows 61 to 66. Areas of Winds west to 10 Mph this evening becoming light.

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Portola Hills Temperature Statistics

September Temperature

Corona Airport (13 miles)

  • Lowest 2 September, 2026

    53.1 °F

  • Average September

    74 °F

  • Highest 9 September, 2026

    109 °F

Climate (2021–2026)

Corona Airport (13 miles)

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  • Average Low 2021–2026

    52.4 °F

  • Average 2021–2026

    65.1 °F

  • Average High 2021–2026

    78.4 °F
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